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Jan Kara 7137c6bd45 aio: fix race between io_destroy() and io_submit() 
A race can occur when io_submit() races with io_destroy():

 CPU1						CPU2
io_submit()
  do_io_submit()
    ...
    ctx = lookup_ioctx(ctx_id);
						io_destroy()
    Now do_io_submit() holds the last reference to ctx.
    ...
    queue new AIO
    put_ioctx(ctx) - frees ctx with active AIOs

We solve this issue by checking whether ctx is being destroyed in AIO
submission path after adding new AIO to ctx.  Then we are guaranteed that
either io_destroy() waits for new AIO or we see that ctx is being
destroyed and bail out.

Cc: Nick Piggin <npiggin@kernel.dk>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-02-25 15:07:37 -08:00
..
9p
switch 9p
2011-01-12 20:03:43 -05:00
adfs
switch adfs
2011-01-12 20:02:45 -05:00
affs
switch affs
2011-01-12 20:03:42 -05:00
afs
afs: Fix oops in afs_unlink_writeback
2011-02-25 11:12:37 -08:00
autofs4
autofs4: clean ->d_release() and autofs4_free_ino() up
2011-01-18 01:21:29 -05:00
befs
befs: don't pass huge structs by value
2011-01-13 08:03:15 -08:00
bfs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
btrfs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
2011-02-25 14:03:39 -08:00
cachefiles
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
ceph
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2011-02-21 15:01:38 -08:00
cifs
[CIFS] update cifs version
2011-02-21 22:31:47 +00:00
coda
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
2011-01-13 10:27:28 -08:00
configfs
configfs: change depends -> select SYSFS
2011-01-16 21:22:29 +00:00
cramfs
cramfs: generate unique inode number for better inode cache usage
2011-01-13 08:03:23 -08:00
debugfs
convert get_sb_single() users
2010-10-29 04:16:28 -04:00
devpts
convert get_sb_single() users
2010-10-29 04:16:28 -04:00
dlm
dlm: use single thread workqueues
2011-02-11 16:50:47 -06:00
ecryptfs
eCryptfs: Copy up lower inode attrs in getattr
2011-02-21 14:46:36 -06:00
efs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
exofs
Revert "exofs: Set i_mapping->backing_dev_info anyway"
2011-02-02 17:53:27 -08:00
exportfs
fs: dcache per-inode inode alias locking
2011-01-07 17:50:31 +11:00
ext2
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
2011-01-11 14:37:31 -08:00
ext3
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
2011-01-21 07:33:37 -08:00
ext4
ext4: serialize unaligned asynchronous DIO
2011-02-12 08:17:34 -05:00
fat
switch fat to ->s_d_op, close exportfs races there
2011-01-12 20:02:43 -05:00
freevxfs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
fscache
FS-Cache: Fix operation handling
2011-01-14 09:23:36 -08:00
fuse
switch fuse
2011-01-12 20:02:44 -05:00
gfs2
mm: prevent concurrent unmap_mapping_range() on the same inode
2011-02-23 19:52:52 -08:00
hfs
switch hfs
2011-01-12 20:02:45 -05:00
hfsplus
hfsplus: fix up a comparism in hfsplus_file_extend
2011-02-03 16:34:18 -07:00
hostfs
switch hostfs
2011-01-12 20:03:42 -05:00
hpfs
hpfs_setattr error case avoids unlock_kernel
2011-01-17 05:11:37 -05:00
hppfs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
hugetlbfs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
isofs
fix isofs d_op handling
2011-01-12 20:02:43 -05:00
jbd
fix comment typos concerning "consistent"
2010-12-10 16:04:28 +01:00
jbd2
jbd2: call __jbd2_log_start_commit with j_state_lock write locked
2011-02-12 08:18:24 -05:00
jffs2
Merge git://git.infradead.org/mtd-2.6
2011-01-17 11:15:30 -08:00
jfs
Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block
2011-01-13 10:45:01 -08:00
lockd
NLM: Fix "kernel BUG at fs/lockd/host.c:417!" or ".../host.c:283!"
2011-01-25 15:24:47 -05:00
logfs
Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block
2011-01-13 10:45:01 -08:00
minix
minixfs: kill dead code
2011-01-12 20:02:44 -05:00
ncpfs
move internal-only parts of ncpfs headers to fs/ncpfs
2011-01-12 20:03:43 -05:00
nfs
NFS: NFSv4 readdir loses entries
2011-01-28 13:41:35 -05:00
nfs_common
NFS: Prevent memory allocation failure in nfsacl_encode()
2011-01-25 15:24:47 -05:00
nfsd
nfsd: correctly handle return value from nfsd_map_name_to_*
2011-02-16 18:31:05 -05:00
nilfs2
mm: prevent concurrent unmap_mapping_range() on the same inode
2011-02-23 19:52:52 -08:00
nls
…
notify
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2011-01-13 10:05:56 -08:00
ntfs
NTFS: Fix invalid pointer dereference in ntfs_mft_record_alloc().
2011-01-31 12:58:11 +10:00
ocfs2
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
2011-01-21 07:33:37 -08:00
omfs
new helper: mount_bdev()
2010-10-29 04:16:13 -04:00
openpromfs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
partitions
ldm: corrupted partition table can cause kernel oops
2011-02-25 15:07:36 -08:00
proc
s390: remove task_show_regs
2011-02-15 07:34:16 -08:00
qnx4
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
quota
quota: Fix deadlock during path resolution
2011-01-12 19:14:55 +01:00
ramfs
convert get_sb_nodev() users
2010-10-29 04:16:31 -04:00
reiserfs
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
2011-01-21 07:33:37 -08:00
romfs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
squashfs
squashfs: fix use of uninitialised variable in zlib & xz decompressors
2011-01-26 10:50:05 +10:00
sysfs
kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT
2011-01-20 17:02:05 -08:00
sysv
switch sysv
2011-01-12 20:02:44 -05:00
ubifs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
udf
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6
2011-01-11 14:45:52 -08:00
ufs
fs: icache RCU free inodes
2011-01-07 17:50:26 +11:00
xfs
xfs: check if device support discard in xfs_ioc_trim()
2011-02-22 15:08:44 -06:00
aio.c
aio: fix race between io_destroy() and io_submit()
2011-02-25 15:07:37 -08:00
anon_inodes.c
sanitize vfsmount refcounting changes
2011-01-16 13:47:07 -05:00
attr.c
…
bad_inode.c
fs: provide rcu-walk aware permission i_ops
2011-01-07 17:50:29 +11:00
binfmt_aout.c
Don't dump task struct in a.out core-dumps
2010-10-14 10:57:40 -07:00
binfmt_elf_fdpic.c
…
binfmt_elf.c
binfmt_elf: cleanups
2011-01-13 08:03:12 -08:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
convert get_sb_single() users
2010-10-29 04:16:28 -04:00
binfmt_script.c
Make do_execve() take a const filename pointer
2010-08-17 18:07:43 -07:00
binfmt_som.c
…
bio-integrity.c
bio-integrity: mark kintegrityd_wq highpri and CPU intensive
2011-01-03 15:01:48 +01:00
bio.c
bio: take care not overflow page count when mapping/copying user data
2010-11-10 14:40:43 +01:00
block_dev.c
Merge branch 'for-linus' of git://neil.brown.name/md
2011-02-25 11:13:26 -08:00
buffer.c
fs: Use this_cpu_inc_return in buffer.c
2010-12-17 15:18:05 +01:00
char_dev.c
Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block
2011-01-13 10:45:01 -08:00
compat_binfmt_elf.c
…
compat_ioctl.c
Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
2011-01-07 14:39:20 -08:00
compat.c
compat: copy missing fields in compat_statfs64 to user
2011-01-17 04:54:38 -05:00
dcache.c
fs: fix new dcache.c kernel-doc warnings
2011-01-22 20:32:38 -08:00
dcookies.c
…
direct-io.c
fs/direct-io.c: don't try to allocate more than BIO_MAX_PAGES in a bio
2011-01-20 17:02:05 -08:00
drop_caches.c
…
eventfd.c
Docbook: add fs/eventfd.c and fix typos in it
2011-02-21 15:07:04 -08:00
eventpoll.c
epoll: prevent creating circular epoll structures
2011-02-25 15:07:36 -08:00
exec.c
vfs: sparse: add __FMODE_EXEC
2011-02-02 16:03:19 -08:00
fcntl.c
vfs: sparse: add __FMODE_EXEC
2011-02-02 16:03:19 -08:00
fifo.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
file_table.c
CRED: Fix kernel panic upon security_file_alloc() failure.
2011-02-04 10:40:29 -08:00
file.c
vfs: use kmalloc() to allocate fdmem if possible
2010-08-11 08:59:02 -07:00
filesystems.c
fs: rcu-walk for path lookup
2011-01-07 17:50:27 +11:00
fs_struct.c
sanitize vfsmount refcounting changes
2011-01-16 13:47:07 -05:00
fs-writeback.c
fs/fs-writeback.c: fix sync_inodes_sb() return value kernel-doc
2011-01-13 17:32:48 -08:00
generic_acl.c
fs: provide simple rcu-walk generic_check_acl implementation
2011-01-07 17:50:29 +11:00
inode.c
Merge branch 'for-linus' of git://neil.brown.name/md
2011-02-25 11:13:26 -08:00
internal.h
Fix over-zealous flush_disk when changing device size.
2011-02-24 17:25:47 +11:00
ioctl.c
fs: make block fiemap mapping length at least blocksize long
2011-02-02 16:03:20 -08:00
ioprio.c
ioprio: grab rcu_read_lock in sys_ioprio_{set,get}()
2010-11-15 10:23:31 +01:00
Kconfig
kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT
2011-01-20 17:02:05 -08:00
Kconfig.binfmt
coredump: default CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
2010-10-27 18:03:12 -07:00
libfs.c
pass default dentry_operations to mount_pseudo()
2011-01-12 20:03:43 -05:00
locks.c
Merge branch 'for-2.6.38' of git://linux-nfs.org/~bfields/linux
2011-01-14 13:17:26 -08:00
Makefile
Merge 'staging-next' to Linus's tree
2010-10-28 09:44:56 -07:00
mbcache.c
ext2: Resolve 'dereferencing pointer to incomplete type' when enabling EXT2_XATTR_DEBUG
2011-01-10 19:04:08 +01:00
mpage.c
fs/mpage.c: consolidate code
2011-01-13 17:32:32 -08:00
namei.c
vfs: fix BUG_ON() in fs/namei.c:1461
2011-02-16 08:56:55 -08:00
namespace.c
Unlock vfsmount_lock in do_umount
2011-02-24 02:10:57 -05:00
nfsctl.c
…
no-block.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
open.c
Fix possible filp_cachep memory corruption
2011-02-11 15:53:38 -08:00
pipe.c
Fix broken "pipe: use event aware wakeups" optimization
2011-01-20 16:21:59 -08:00
pnode.c
fs: scale mntget/mntput
2011-01-07 17:50:33 +11:00
pnode.h
…
posix_acl.c
NFS: Prevent memory allocation failure in nfsacl_encode()
2011-01-25 15:24:47 -05:00
read_write.c
fix signedness mess in rw_verify_area() on 64bit architectures
2011-01-12 20:06:58 -05:00
read_write.h
…
readdir.c
…
select.c
fs/select.c: fix information leak to userspace
2011-01-13 08:03:12 -08:00
seq_file.c
fs: take dcache_lock inside __d_path
2010-10-25 21:26:12 -04:00
signalfd.c
Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6
2010-10-26 10:13:10 -07:00
splice.c
Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block
2011-01-13 10:45:01 -08:00
stack.c
…
stat.c
Add an AT_NO_AUTOMOUNT flag to suppress terminal automount
2011-01-15 20:07:33 -05:00
statfs.c
…
super.c
vfs: call rcu_barrier after ->kill_sb()
2011-02-11 16:12:19 -08:00
sync.c
…
timerfd.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
utimes.c
Mark arguments to certain syscalls as being const
2010-08-13 16:53:13 -07:00
xattr_acl.c
…
xattr.c
…